Securing means for pneumatic tires



Dec. 20, 1927. H. "P. MACK SECURING MEANS FOR PNEUMATIC TIRES Filed Feb. 15. 1926 be either in the form of an annulus l0 ripheral portion 6 50 side of said casing nearer Patented Dec. 20, 1927.

HANS P. MACK. 0F SALT LAKE CITY, UTAH.

SECURING MEANS FOR PNEUMATIC TIRES.

Application filed February 1926. Serial No. 88.851.

This invention relates to a device to secure ordinary pneumatic tire casings upon the rim in such a manner as to form an air tight enclosure without employing the usual innertube. and has for its objects:

First: To obviate the. use of: the ordinary inner tube in a pneumatic tire.

Second: lo provide a. means for securing a tire casing in such manner as to form an l air tight seal between the said casing and rim.

Third: To devise a securing means of the kind specified which will be cheap to manufacture and etlicient and durable in use.

i In the drawings:

Fig. 1 is a cross sectional \ien' substan tially on the line l--l on Figure 4. showing the relationships-existing among the parts of my device when in operative position 3 upon therim;

Fig. 2 IS an enlarged sectional view taken on the line 2-? of Fig. 1:

Fig. 3 is a sectional view along the line 3-3 of Figure 4: I 6 Fig. 4 is a diagrannnatic side elevational view of a portion of a tire employing my invention; to disclose the relative positions of the two valves.

.The numeral 1 designates a conventional L0 straight side rim whcreon 18 mounted a casing 2 of the usual type. but. without the customary inner tube.

Lying uponriin 1, between heads 3 of casing 2 lies a soft rubber element 4 which may or a strip having bevelled ends to overlap and form a tight joint.

Seated upon element a is the high pressure sealing casing 5, having an outer peand bead members 7 within 5 is an inner tube 8 which is inflated by means of a valve 9 of the usual type.

From each side of 5 there extends a flap member 10, preferably of some soft material.

su h as inner tube rubber. which may be integral with a ply of the peripheral portipn 6 of casing 5 or may be separate and mdividually vulcanized to said casing; they may also be secured to 5 up to a line on cue shown in Fig. 1. 'Each flap 10 is passed around a bead 3 of casing 2. lying between said head and rim 1.

Casing 5. lS constructed to' carry 125 5 pounds of air pressure persquare inch unthe beads 7 than.

der normal operating conditions. Under this pressure the beads T will be forced very tightly radially inwardly and laterally outwardly against the edges of strip 4, which being of soft rubber will be squeezed tightly against flaps l0 and thus bind said flaps against beads 3 with an air-tight contact: the sides of easing 5 adjacent the beads 7 thereof will also be forcedoutwardly and thus increase the area of contact between flaps 10 and the casing 2.

A valve havinga tube 11 long enough to extend completely through casing 5 and discharge air into casing 2 is provided to inflate the latter casing to any desired pressure: when said latter casing is filled with air to the proper degree the beads 3 will be more. vigorouslv forced against rim 1 with a consequent additional tightness of seal.

it is to be understood that.- the figures of the drawing are purely diagrammatic and explanatory and are not to be interpreted as narrowing the scope. of this invention beyond that defined in the appended claims.

It is thus apparent that I have invented a device which fully achieves the objects set forth above. A car equipped with tires made according to this present disclosure has traveled almost two thousand miles over desert and mountain roads. and these tires have. given no trouble whatsoever and have been perfectly satisfactory in every respect.

The invention for which Letters Patentare hereby sought has proved a success under the hardest kind of practical usage.

I claim:

1. A means for securing a pneumatic tire casing upon the rim. comprising a readily distortable element and fluid-pressure actuated means to distort said element.

2. In a means for securing a pneumatic tire casing upon a rim. a high fluid-pressure retaining element, and a flexible and compressible member ongeach side of said element and in part secured thereto.

3. In combination. a readily distortable element disposed on the rim ofa pneumatic tire, and a tube adapted to contain air at high pressure disposed about and distorting said element and causing salid element to form an air tight seal.

' 4:. In combination, a pneumatic tire casing, a soft element disposed between the beads of said casing, an inflatable air tube disposed around said elements, and a flap member secured to each side of said air tube and passed around the beads of said pneumatic tire casing.

5. In combination, a pneumatic tire casing, a soft member disposed between the beads of said casing, disposed about said soft member and within said casing, flaps secured to said inflatable an inflatable member -member and passed about the beads of said HANS P. MACK. 

